This fills a tiny gap in the positional_arguments suite. Most existing
tests have positional arguments. The one case without an argument uses
Argument::remaining so that ArgumentParserArgument::parse_args does not
throw, instead ArgumentParser::get<> throws std::logic_error.
Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
This silences the following warning:
No project() command is present. The top-level CMakeLists.txt file must
contain a literal, direct call to the project() command. Add a line of
code such as
project(ProjectName)
near the top of the file, but after cmake_minimum_required().
CMake is pretending there is a "project(Project)" command on the first
line.
Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
Argument.scan handles simple string to numeric type conversions, removing
the need to create a lambda. Argument.action is still necessary for more
complex conversions and those are left unchanged.
Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
.present returns std::nullopt if the optional argument is not given by the
user -- as long as a .default_value is not defined. With a .default_value,
.present cannot be used to determine if a value is user-provided or the
default.
.is_used fills that role and only returns true if the argument was passed
by the user.
Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
The default behavior with optional arguments is to allow only a single use
per invocation. One alternative is to use .nargs, but this requires
previously knowing, and limiting, the quantity of values. The .append
method removes the restriction on repeats for a single Argument.
Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
Two differences that diverge from the existing behavior:
1. Leading zeros are not allowed for integers. Negative
octal numbers such as `-066` are not meant to be treated
as positional arguments, but existing code recognize them
as decimal numbers. Note that negative floating-point
numbers with leading zeros (`-003.`) are unambiguous and
are recognized.
2. Inf and NaN are not recognized. This is because options
like `-inf` is indistinguishable from a compound argument
that meant to be a shorthand for `-i -n -f`.
fixes: p-ranav/argparse#55
The change also fixes a rare bug introduced in 9007958:
when there are duplicated keys, insert_or_update overrides
previously inserted ones, emplace doesn't.
fixes: p-ranav/argparse#59
This change also explicitly lists the source files
for CMake. This is because `GLOB` does not remove
old files when switching branches in Git, and
`CONFIGURE_DEPENDS` will add unstaged files after
stashing.
See also: https://cmake.org/cmake/help/latest/command/file.html#glob
Before this change:
1. When the input is built-in string literal or cv-`char*`,
`is_optional` constructs temporary `std::string` while
`mNames` initializer is also constructing `std::string`
due to the use of `std::initializer_list`.
2. When the input is `std::string_view`, doesn't compile.
3. When the input is `std::string`, `mNames` initializer
moves `args`. If argument name is longer than
`std::string`'s SSO buffer, bad thing will happen because
`is_optional` will be accessing `args` in moved-from
states.
Because of the use of `strtol` which expects nul-terminated
input, `is_*` series functions must take `std::string`. This
restriction may be removed after AppleClang adds `<charconv>`.
But for now, it complicates the patch. My solution is to
create an array prvalue still, but use a array reference
rather than `std::initializer_list` to refer to it, so that
the code in delegated constructor can keep using fold
expressions after the necessary `std::string` objects being
created.
